CN1074618C - Method for adjusting reference frequency in communication system - Google Patents
Method for adjusting reference frequency in communication system Download PDFInfo
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- CN1074618C CN1074618C CN95190459A CN95190459A CN1074618C CN 1074618 C CN1074618 C CN 1074618C CN 95190459 A CN95190459 A CN 95190459A CN 95190459 A CN95190459 A CN 95190459A CN 1074618 C CN1074618 C CN 1074618C
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- base station
- reference frequency
- dwelling house
- station
- frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
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- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
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Abstract
The frequency accuracy in a communication system as a whole is improved by the method of the invention and it is not necessary to use an accurate frequency reference in all stations or in all types of stations. The reference frequencies of the remaining stations or types of stations may be adjusted based on the precise reference frequency of one station. Specifically, a method of adjusting a reference frequency in a communication system including a portable station, a residential base station, and a public base station that generates a first reference frequency, is characterized by comprising the steps of: a second reference frequency in the portable station is adjusted (512) based on the first reference frequency, and a third reference frequency of the residential base station is adjusted based on the second reference frequency.
Description
The present invention relates to communicator, be specifically related to adjust the method for frequency of the device of communication system.
Cordless telephone system generally includes a portable station (for example portable wireless mobile phone) and a dwelling house base station (for example assisted cordless base station), and it links the telephone system of telephone operator by the phone land line.The dwelling house base station has an appointed landline phone numbers, and it allows the user for example to utilize portable station to send and receipt of call in the limited range of dwelling house base station in dwelling house.But, because of its limited service range, so portable station can only provide than the radiotelephone communication in the zonule for the user.
Radiotelephone communication outside the scope of Home Telephone system also can offer the user by cellular telephone system.Cellular telephone system generally includes honeycomb fashion subscriber unit (movable type or portable) and links the cellular base stations of landline telephone system by one or more honeycomb fashion switching networks.It is the words numbers that each honeycomb fashion subscriber unit has an appointed honeycomb fashion, and it allows the user for example to send and receipt of call in metropolitan whole zone in the broad scope of cellular base stations.
A kind of cordless communications system that contains portable station is open.This portable station is had the ability and conventional cellular radio and telephone (it has a plurality of cellular base stations), public base station or dwelling house base station (it provides the interconnection of private telephone line to telephone network for the portable station user) communicate.Public base station can be microcellulor formula base station for example.But, just have a problem when very accurately controlling tranmitting frequency when these communication systems depend on.In the past, this was that utilization point-device frequency reference in cellular base stations, public base station, dwelling house base station and portable station realizes.But for being incorporated into the low-cost wireless phone, these point-device frequency reference all too costlinesses.
Only using two types base station for example in the prior art of the system of cellular base stations and portable station, eliminating in portable station demand already point-device frequency reference.This is by using point-device frequency reference and use in portable station than frequency reference and automatic frequency control (AFC) circuit of low accuracy and realize in cellular base stations.The AFC circuit is used for according to the frequency reference of adjusting portable station from the received signal of cellular base stations.In this manner, the accuracy of the frequency reference of portable station improves.
But this does not improve the situation for the system that contains a plurality of stations that can not directly monitor the station with point-device frequency reference.
In view of the above, need now and required frequency accuracy to be provided and to need not in all types of stations, to adopt the method and apparatus of point-device frequency reference communication system.For example in cellular base stations, use point-device frequency reference by station, just might in the station of all other types, obtain high-caliber frequency accuracy at one type.
Now also need eliminate demand for the frequency error detection ability in the radio telephone of adjusting its frequency reference according to the wireless telephonic frequency reference that communicates with.
Fig. 1 illustrates the active configuration block diagram of portable radiotelephone, can be inserted by same portable radiotelephone in interior several systems comprising cellular system and residential system.
Fig. 2 illustrates the block diagram of special permission and call routing equipment (ACRE).
Fig. 3 illustrates the typical layout of the overlay area of residential system, synergic system and cellular system.
Fig. 4 illustrates the block diagram of the dwelling house base station that can utilize a kind of routine of the present invention.
Fig. 5 illustrates the block diagram of the portable radio telephone set that can utilize a kind of routine of the present invention.
Fig. 6 illustrate a kind of according to usefulness of the present invention so that the block diagram of the method that portable station and dwelling house base station communicate.
Fig. 7 illustrates a kind of block diagram according to first embodiment in order to the method for adjusting the reference frequency in the communication system of the present invention.
Fig. 8 illustrates a kind of block diagram according to second embodiment in order to the method for adjusting the reference frequency in the communication system of the present invention.
Fig. 9 illustrates a kind of block diagram according to the 3rd embodiment in order to the method for adjusting the reference frequency in the communication system of the present invention.
Figure 10 illustrates a kind of block diagram according to the 4th embodiment in order to the method for adjusting the reference frequency in the communication system of the present invention.
Figure 11 A and 11B illustrate the more detailed block diagram in order to the method for adjusting the reference frequency in the communication system according to first embodiment shown in Fig. 7.
Figure 12 illustrates the block diagram according to the 5th embodiment in order to the method for adjusting the reference frequency in the communication system of the present invention.
Figure 13 illustrates the more detailed block diagram in order to the expansion of square frame 1125 in the method for the reference frequency of adjusting the dwelling house base station of Figure 12.
Figure 14 illustrates the more detailed block diagram in order to the expansion of the square frame 1125 in the another kind of method of the reference frequency of adjusting the dwelling house base station of Figure 12.
Figure 15 illustrates the more detailed block diagram of Figure 12 in order to the expansion of the square frame 1125 in another method of the reference frequency of adjustment dwelling house base station.
Figure 16 illustrates the block diagram according to the method for adjusting in order to the reference frequency in the new communication system more of the present invention.
Generally speaking, method of the present invention provides required frequency accuracy for communication system, and need not to use in all stations or all types of station point-device frequency reference.Point-device frequency reference can be only adopts in the station of a station or a type.The frequency reference than low accuracy then can be adopted in the station of other station or other type.Use method of the present invention, all adopt the frequency accuracy than the station of the frequency reference of low accuracy to improve.This in addition can be by not realizing with indivedual stations that the station of containing point-device frequency reference communicates.
Fig. 1 shows the summary block diagram of a kind of application of the present invention.Portable station 101 can have the ability that communicates with conventional cellular radio telephone communication system 103, system 103 has a plurality of cellular base stations 105,107, these base stations are positioned on the geographical position of separating, but its layout is suitable for providing the radio telephone scope that covers broad geographic area.Cellular base stations is coupled to control terminal 109, control terminal 109 provides the coordination between a plurality of cellular base stations, comprise that user's honeycomb fashion moves the handover with portable unit, and provide to public switched telephone network (hereinafter being called " TELCO ") 111 and to call out exchange and interconnection.
At last, portable station 101 is also had the ability by the 115 transmitting/receiving wireless calls of dwelling house base station, and it provides the interconnection of private telephone line to TELCO111 for the user of portable station 101.Cordless communications system utilization special permission and call route selecting equipment (ACRE) 117 provide call route selecting information to telephone switching system.Therefore, switching system is automatically controlled the call route between cellular system, synergic system and residential system.ACRE117 also speciallys permit dwelling house base station 115 and uses channel.ACRE117 can be the part of TELCO111 or the device of independent operation.As previously mentioned, dwelling house base station 115 and portable station 101 provide the limited range that is commonly called cordless telephone service radio traffic together.Because the several radio-frequency channels in use VHF (very high frequency(VHF)) or UHF (hyperfrequency) radio bands usually, this business have become disperse.
Wireless telephonic user expectation: when the domestic radiotelephone service Anywhere of the U.S. that he goes to all is effectively, and this business is to obtain with minimum price, expects that also radiotelephone service can provide in as far as possible little and cheap portable unit.The structure that portable station 101 is solely held has satisfied this requirement.Though portable station can be suitable for and illustrated whole three kinds of system communications, portable station also is suitable for the system communication with any combination.For example, portable station is suitable for communicating by letter with cellular base stations with the dwelling house base station.In other words, portable station is suitable for and dwelling house base station and public base station communication.In addition, when the user has portable station 101 in the a-n radio range a-n of dwelling house base station 115, dwelling house base station 115 solely with holding design interconnection with user's Home Telephone line can be provided.Although a portable station only is shown, the system that supports a plurality of portable stations also within the scope of the invention.
The block diagram of ACRE117 as shown in Figure 2, ACRE117 links TELCO111 by interface 202.Message control and format between 202 couples of TELCO111 of interface and the processor 204.The processor 204 that makes up with Control Software memory 206 is intelligence part and execution mandates of ACRE117 and differentiates task and call routing information is provided.Customer data base 208 includes processor 204 for carrying out the data of above-mentioned required by task.ACRE117 can resemble to divide with TELCO111 shown in Figure 2 and open, and also can be the part of TELCO111, normally the part of switching equipment.When ACRE117 was TELCO111 a part of, ACRE117 can not need interface 202.In addition, the function of ACRE117 can be carried out by the existing equipment among the TELCO.At last, according to some aspect of the present invention, ACRE can only provide identification function, and can be regarded as authentication equipment.Although following explanation is usually directed to ACRE, be appreciated that term " ACRE " also can be considered authorisation device, this depends on enforcement.
Fig. 3 illustrates the typical area of coverage layout plan of dwelling house, public and cellular system.The residential system area of coverage is minimum and be within the common system area.Synergic system has the medium area of coverage and is within the cellular system district.The area of coverage of each system depends on but is not limited to following factor: the power level that the antenna height of the quantity of base station, each base station and each system use in each system.The user of portable wireless telephone can move between each area of coverage.Portable wireless telephone according to but be not limited to following factors: portable wireless telephone position, system effectiveness and user select and can change between system.
The area of coverage of each system is not limited to the specific layout shown in Fig. 3.An area of coverage can be independent of another area of coverage, or can be partly overlapping with one or more other areas of coverage.
In concept, dwelling house base station 115 is the subminiature cellular systems that single signaling channel is provided, it sends the departures data-message in the mode similar to conventional honeycomb fashion departures signaling channel, and receives service request from the unit, ground far away such as portable station 101.Reasonably service request is allowed the voice channel (by control channel produce) of assignment on same or second radio frequency, and portable station 101 is tuned to described frequency by instruction for its call.
Fig. 4 shows the basic enforcement of dwelling house base station.Be used for the conventional transmitter 301 of conventional honeycomb fashion business and the frequency band that conventional receiver 303 is suitable for 869-894MHz and 824-849MHz respectively, be coupled on the common antenna 305 by duplexer 307.Duplexer 307 also can be a switch in time division duplex (TDD) system.The channel frequency selection is to be realized by the frequency synthesizer 309 that is subjected to logical block 311 controls.A microprocessor 313 is located in the logical block 311, for example be the 68HC11 that can obtain from Motorola Inc. or similar microprocessor, it is coupled on the conventional memory spare 315, user personality (cus-tomizing personality) and other feature of latter's storage microprocessor operation sequence, identification of base stations (BID) and regulation.The data that receive and launch are encoded/decipher and are coupling between receiver 303, transmitter 301 and the microprocessor 313 by signaling interface hardware 317.Microprocessor instruction is transmitted and is carried out by control hardware 319.Realize by normal mode by TELCO interface 321 with user's Home Telephone land line interfaces.Power supply is by the AC mains supply of routine, and by a battery pack standby (all by power supply 323 expressions).
In this preferred embodiment, microprocessor 409 is 68HC11 microprocessors of buying from Motorola Inc., carries out the necessary processing function under the control of its program in being stored in conventional ROM421.The feature of portable station 101 is stored among the EEPROM413 (also can be stored on microprocessor, the plate among the EEPROM), and is included in the required number assignment (NAM) and with user's oneself the dwelling house base station required identification of base stations (BID) of working of working in the conventional cellular system.
According to this preferred embodiment of the present invention, with portable station 101 can with dwelling house and cellular telephone system compatibility.This realizes by allowing portable station 101 usefulness cell phone frequencies to be operated in dwelling house and the cellular telephone system 103.
This wireless telephonic arrangement has desirable advantage for the user.The portable station 101 that combines with dwelling house base station 115 automatically is sent to incoming call the telephone system at portable station 101 places by ACRE117, and does not bother the user.The TELCO14 that combines with ACRE117 automatically is sent to incoming call portable station 101, and does not bother the user.
Now go to Fig. 6, the block diagram among the figure illustrates a kind of universal method of the reference frequency that is used for adjusting the communication system portable station with portable station and dwelling house base station.Specifically, in step 512, portable station utilizes automatic frequency control (AFC) its reference frequency to be adjusted to the frequency of dwelling house base station.In step 514, portable station registers to the dwelling house base station.In step 516, system takes conventional dwelling house base station operation.
Referring now to Fig. 7, be used for more first embodiment of the method for the frequency of new communication system shown in the figure.The method of Fig. 7 generally includes following steps: the reference frequency of upgrading portable station according to the reference frequency of public base station; According to the reference frequency of adjusted portable station, utilize automatic frequency control, adjust the base station frequency of dwelling house base station; According to the reference frequency of dwelling house base station, keep the reference frequency of portable station.Specifically, the method for Fig. 7 for example begins when the portable station energized from step 610.In step 612, portable station is determined in its scope that whether is in public base station.If portable station is in this scope, then utilize automatic frequency control its frequency to be adjusted to the reference frequency of public base station at step 614 portable station.
In step 616, determine mode of operation usually.Mode of operation can be selected by hand by the user, for example selects with a switch, or is automatically selected by portable station according to the requirement order of the availability of selected system and the system that should select.In the system of portable station and dwelling house base station and public base station communication, determine whether to select public mode in step 616.
If select public mode, then register to public base station, and take conventional public mode to operate in step 620 at step 618 portable station.If in the non-selected public mode of step 616, then utilize automatic frequency control its reference frequency to be adjusted to the reference frequency of portable station in step 622 dwelling house base station.Step 624, portable station utilize automatic frequency control its reference frequency to be adjusted to the reference frequency of dwelling house base station.Register to the dwelling house base station at step 626 portable station.Enrollment process is used to guarantee the licensed and dwelling house base station communication of portable station.It is commonly known in the art that portable station registers to the base station.At last, take the routine operation mode in step 628 dwelling house base station.In the dwelling house base station of routine mode operating period, portable station will utilize automatic frequency control preferably periodically to adjust the reference frequency of its reference frequency to the dwelling house base station.Note that in step 612 if portable station is not in the scope of public base station.Then utilize automatic frequency control to adjust the reference frequency of its reference frequency to the dwelling house base station at step 624 portable station.
In a word, according to a features of novelty of the method for Fig. 7, portable station is according to setting up a reference frequency such as the accurate benchmark frequency of public base station.Its reference frequency is adjusted according to the reference frequency of portable station in the dwelling house base station.At last, can be present in the environment that reference frequency keeps more stablely, because of the dwelling house base station so portable station will periodically be adjusted its reference frequency according to the reference frequency of dwelling house base station.
Forward Fig. 8 to, be used for adjusting second embodiment of method of the reference frequency of communication system shown in the figure.The method of Fig. 8 is to adjust the frequency of dwelling house base station according to the reference frequency of public base station generally speaking.Specifically, determine in step 712 dwelling house base station whether it is in the scope of public base station.If the dwelling house base station is in the scope of public base station, then utilize automatic frequency control to adjust the reference frequency of its reference frequency to public base station in step 714 dwelling house base station.Take normal dwelling house base station operation in step 716 by system.In positive conventional operating period, portable station utilizes automatic frequency control to adjust the reference frequency of its reference frequency to the dwelling house base station.
With reference to Fig. 9, be used for adjusting second embodiment of method of the frequency of communication system shown in the figure.According to the method for Fig. 8, steal portable station and utilize automatic frequency to control the reference frequency of its frequency being adjusted to public base station, and the reference frequency of its reference frequency to portable station adjusted/kept in the dwelling house base station.Specifically, in step 812, portable station is determined in its scope that whether is in public base station.If portable station is in this scope, then utilize automatic frequency control to adjust the reference frequency of its reference frequency to public benchmark at step 814 portable station.Determine whether to have selected public mode in step 816.In step 818, portable station is registered with public base station.Take normal public mode to operate in step 820 communication system, wherein portable station is periodically adjusted its reference frequency according to the reference frequency of public base station.If in the non-selected public mode of step 816, then in step 822, the dwelling house base station utilizes automatic frequency control to adjust the reference frequency of its reference frequency to portable station.Register with the dwelling house base station at step 824 portable station.Taking to live normally wide base station mode in step 826 operates.During normal dwelling house base station operation, the dwelling house base station will utilize automatic frequency control preferably also to adjust the frequency of its reference frequency to portable station.
Go to Figure 10, disclose the 4th embodiment of the method for the reference frequency that is used for adjusting communication system among the figure.The method of Figure 10 is to utilize automatic frequency control to adjust the reference frequency of dwelling house base station according to the reference frequency of public base station generally speaking, adjusts the reference frequency of portable station thereafter according to the reference frequency of dwelling house base station.The reference frequency of dwelling house base station is being kept according to the reference frequency of portable station subsequently.At length with reference to the block diagram of Figure 10, in its scope that whether is in public base station is determined in step 912 dwelling house base station.If it is in this scope, then utilize automatic frequency control to adjust its reference frequency according to the reference frequency of public base station in step 914 dwelling house base station.
Determine whether to have selected public mode in step 916.If selected public mode, then register with public base station at step 918 portable station.In step 920, take normal public mode to operate.If non-selected public mode then utilizes automatic frequency control to adjust its frequency at step 922 portable station according to the reference frequency of dwelling house base station.Adjust its frequency in step 924 dwelling house base station according to the reference frequency of portable station.In registering, and in step 928, take normal dwelling house mode to operate at step 926 portable station with the dwelling house base station.In normal dwelling house mode operating period, its reference frequency will preferably periodically be adjusted according to the reference frequency of portable station in the dwelling house base station.Note that in step 912 not to be in the scope of public base station, then will adjust its frequency according to the reference frequency of portable station, and will register and take normal dwelling house mode to operate in step 926 and 928 portable stations in step 924 dwelling house base station as if the dwelling house base station.
Go to Figure 11 A and 11B, be shown specifically the block diagram of a particular of method shown in Figure 7 among the figure.Specifically, in the public base station of step 1004 portable station scanning search.In step 1006,, then determine whether to adjust its frequency at step 1008 portable station if portable station is in the scope of public base station.Specifically, determine at step 1010 portable station whether temperature is in the scope of regulation.Described temperature can be other the predetermined temperature in actual temperature, ambient temperature or the system of portable station.Another kind of scheme is to determine whether to adjust the frequency of portable station according to some other standard.Temperature is a factor that influences the stability of reference frequency, provides as an example at this.If temperature is in the scope of regulation, then adjust the reference frequency of its reference frequency to public base station at step 1012 portable station.Determine at step 1014 portable station whether the reference frequency value of being adjusted is different from the value of storage formerly.At step 1016 portable station the AFC value is stored in the memory.Also in memory, set renewal dwelling house base station (RBS) mark at step 1018 portable station.Memory is a nonvolatile memory of portable station preferably.If temperature is not in the prescribed limit or the reference frequency adjusted is identical with formerly value, then determine at step 1020 portable station whether public mode is selected.If selected public mode, then register to public base station and begin normal public mode and operate at step 1022 portable station.
If portable station is not in the scope of public base station, then determine whether to have selected public mode in step 1006 at step 1024 (Figure 11 B) portable station.If selected public mode, then do not provide professional in step 1026.If still non-selected public mode is then in step 1023 portable station scanning search dwelling house base station (whether this and portable station adjust its reference frequency according to the estimation of step 1008 pair temperature in step 1012 irrelevant).Determine whether to be in the scope of dwelling house base station at step 1030 portable station.If portable station is not in this scope, then do not provide professional.If portable station is in the scope of dwelling house base station, then carry out distant place base station frequency refresh routine at step 1034 portable station.
More particularly, at step 1036 portable station from distant place base station requests time mark (time stamp).Determine whether to set renewal RBS mark at step 1038 portable station.If set renewal RBS mark, then time mark is formerly compared with current time mark, to determine the time interval between twice registration at step 1044 portable station.If the time interval between step 1046 registration is in the predetermined scope, then send user defined message (UDM) to the dwelling house base station at step 1048 portable station, its base station frequency is adjusted to the reference frequency of portable station in request dwelling house base station.After portable station sends UDM, set a timer in step 1050.Determine the timer termination that whether expired at step 1052 portable station.
If timer is not expiration termination as yet, then determine whether to receive the AFC confirmation signal from the dwelling house base station at step 1054 portable station.If do not receive the AFC confirmation signal, determine the timer termination that whether expires in step 1052.If portable station has been received the termination that expired of confirmation signal or timer, then reset and upgrade dwelling house base station mark/timer in step 1056.In step 1058, portable station is adjusted to its reference frequency the reference frequency of dwelling house base station.Register with the dwelling house base station at step 1059 portable station, and operate in the normal dwelling house mode of step 1060 beginning.At last, in step 1062, carry out a test and determine whether it is the time of carrying out the AFC operation.If "Yes", program begin to carry out from step 1036 once more.If "No" then continues normal dwelling house mode at step 1060 portable station and operates.
With reference to Figure 12, be used for adjusting another embodiment of method of frequency of the device of communication system shown in the figure.Figure 12 illustrates a kind of method that is used to upgrade the reference frequency of dwelling house base station generally, promptly at first upgrades the reference frequency of portable station according to the reference frequency of cellular base stations, adopts the benchmark of this renewal to adjust the reference frequency of dwelling house base station thereafter.This method comprises some steps, have high-quality reference frequency to guarantee portable station, and has guaranteed that not the reference frequency of obtaining renewal because of portable unit consumes the too much time.Specifically, be eliminated at step 1103 high-quality AFC mark.Subsequently at step 1105 portable station scanning search cellular base stations.If find cellular base stations, then determine that at step 1109 portable station whether the cellular base stations signal is greater than signal quality threshold in step 1107.If signal quality surpasses threshold value, then adjust the reference frequency of its reference frequency to cellular base stations at step 1110 portable station.At step 1111 portable station the reference oscillator setting is stored as REF-OSC-CELLULAR.Set high-quality AFC mark at step 1112 portable station subsequently.In step 1113, the portable station AFC timer that resets.Thereafter in step 1116, portable station determines whether it is the time of scanning search dwelling house base station.Realize this point, for example, in a system, if there is different trafficwises to exist, portable station conversion regime automatically then.If search time, then in step 1117 portable station scanning search dwelling house base station.If do not find the dwelling house base station, then return cellular base stations at step 1119 portable station in step 1118.If found the dwelling house base station in step 1118, then in step 1123, portable station determines whether to set high-quality AFC mark.If "Yes", then the reference frequency of dwelling house base station is adjusted to the reference frequency (Figure 13-16 shows the concrete grammar that can adjust the reference frequency of dwelling house base station in step 1125) of portable station.In step 1127, portable station is adjusted the reference frequency of its reference frequency to the dwelling house base station.If in step 1123 is "No", then continue to adjust the program of its reference frequency to the reference frequency of dwelling house base station at step 1127 portable station.
If in step 1116 result is "No", then determine that at step 1109 portable station whether the cellular base stations signal is greater than signal quality threshold.
If be not more than signal quality threshold, then in step 1114, check the AFC timer at step 1109 cellular base stations signal.If it does not surpass AFC overtime (timeout), then program continues in step 1116, promptly determines whether it is the time of scanning search dwelling house base station.If it is overtime that the AFC timer has surpassed AFC, then the step 1115 before step 1116 is removed high-quality AFC mark.
If do not find cellular base stations, then in step 1129 portable station scanning search dwelling house base station in step 1107.If do not find the dwelling house base station, then at step 1105 portable station scanning search cellular base stations in step 1131.
Go to Figure 13, in the step 1125 of Figure 12, be used to adjust the first method of the reference frequency of dwelling house base station shown in the figure.Specifically, at the communication link of step 1201 portable station foundation with the dwelling house base station.In step 1203, portable station is measured dwelling house base station frequency error.If less than threshold value, just do not need to adjust the reference frequency of dwelling house base station in this error of step 1205.But, if error greater than threshold value, is reported this error at value 1207 portable stations to the dwelling house base station.Adjust frequency differing from 1209 dwelling house base stations, and return step 1205 again, to determine that whether error is less than threshold value.
With reference to Figure 14, be used to adjust another embodiment of the reference frequency of dwelling house base station shown in the figure.Specifically, measure dwelling house base station frequency error at step 1301 portable station.By automatic frequency control its reference frequency is adjusted to the reference frequency of dwelling house base station at step 1303 portable station.At the communication link of step 1305 portable station foundation with the dwelling house base station.Determine that at step 1307 portable station whether frequency error is less than threshold value.If frequency error less than threshold value, does not then need to adjust the reference frequency of dwelling house base station.But if error is not less than threshold value, then in step 1309, portable station is to dwelling house base station report frequency error.Adjust its reference frequency in step 1311 dwelling house base station.Preserve the reference oscillator value to REF-OSC-CELLULAR at step 1313 portable station.In step 1315, portable station is measured dwelling house base station frequency error.Adjust the frequency of its reference frequency at step 1317 portable station by automatic frequency control to the dwelling house base station.The amplitude of the frequency adjustment of carrying out in the dwelling house base station is in the system known to the portable station, step 1317 can by portable station simply be tuned to the dwelling house base station frequency adjusted realize.Thereafter program is returned step 1307, to determine that whether frequency error is less than threshold value.
Go to Figure 15, the another embodiment of the method for the reference frequency of the adjustment of land used shown in figure dwelling house base station.Specifically, adjust its frequency to the dwelling house base station at step 1401 portable station.At the communication link of step 1403 portable station foundation with the dwelling house base station.Adjust REF-OSC to the currency of benchmark vibration at step 1404 portable station along controlling value.Determine frequency error in step 1405.Frequency error may simply be the poor of REF-OSC and REF-OSC-CELLULAR, perhaps other function of these two values.Determine that at step 1407 portable station whether frequency error is less than threshold value.If frequency error less than threshold value, does not then need to adjust dwelling house base station reference frequency.But, if frequency error greater than threshold value, is then reported this frequency error at step 1409 portable station to the dwelling house base station.Adjust its reference frequency in step 1411 dwelling house base station.Adjust the reference frequency of its reference frequency at step 1413 portable station, and return step 1404, to adjust this value of REF-OSC to the dwelling house base station.
Note that in the system that can adjust in known dwelling house base station, this program can finish after step 1411 in one step.
With reference to Figure 16, there is shown the dwelling house base station and utilize portable station to upgrade the method for its reference frequency from public base station.Specifically, dwelling house base station commands portable station utilizes automatic frequency control to obtain new reference frequency.In step 1503 portable station is determined its scope that whether is in public base station.If portable station is not in this scope, the method finishes in method 1505.But,, then utilize automatic frequency control to adjust the reference frequency of its reference frequency to public base station at step 1507 portable station if portable station is in this scope.Return the dwelling house base station at step 1509 portable station.At last, adjust the frequency of its frequency in step 1511 dwelling house base station to public base station.
Though described the method for adjusting wireless telephonic reference frequency for the frequency accuracy of improving transmission signals in the above description, but be to be understood that, the means that also have other the wireless telephonic transmission frequency accuracy of adjustment adopt one or more frequencies of adjusting transmission signals in these means not break away from spirit of the present invention.
Claims (7)
1. method that is used for adjusting the reference frequency of communication system, this communication system comprises portable station, dwelling house base station and the public base station that produces first reference frequency, it is characterized in that this method may further comprise the steps:
(a), adjust second reference frequency in the portable station according to first reference frequency; With
(b), adjust the 3rd reference frequency of dwelling house base station according to second reference frequency.
2. according to the method for claim 1, it is characterized in that, also comprise:
(c), keep the 3rd reference frequency according to second reference frequency.
3. according to the method for claim 1, it is characterized in that, also comprise:
(c), keep second reference frequency according to the 3rd reference frequency.
4. the method for adjustment reference frequency as claimed in claim 1, wherein portable station is suitable for first mode and dwelling house base station communication with second mode and public base station communication, and before wherein said step (a) also is included in and adjusts second frequency, detection first reference frequency and described step (b) are finished under first pattern in portable station, it is characterized in that described method also comprises step:
(c) when being in first mode, portable station is registered to the dwelling house base station.
5. the method for adjustment reference frequency as claimed in claim 1, wherein portable station is suitable for first mode and dwelling house base station communication with second mode and public base station communication, and wherein said step (a) is based on described first reference frequency, in described dwelling house base station rather than portable station, adjust second reference frequency, and before described step (a) is included in and adjusts second reference frequency, in the dwelling house base station, detect first reference frequency;
And described step (b) is adjusted the 3rd reference frequency of portable station rather than dwelling house base station based on second reference frequency when being in first pattern, and wherein said method also comprises step: (c) when being in first mode, portable station is registered to the dwelling house base station.
6. the method for adjustment reference frequency as claimed in claim 1, wherein said step (b) are preserved the second reference frequency control setting before being included in and adjusting the 3rd frequency of dwelling house base station based on second reference frequency; And the step (b) of wherein said adjustment the 3rd reference frequency also comprises step:
(b1) portable station is measured dwelling house base station frequency error;
(b2) according to the signal that receives from the dwelling house base station, portable station is adjusted second reference frequency;
(b3) communication link of foundation and described dwelling house base station;
(b4) determine that whether frequency error is greater than threshold value;
(b5) to dwelling house base station report error;
(b6) the 3rd reference frequency of adjustment dwelling house base station;
(b7) second reference frequency in the adjustment portable station is to the second reference frequency control setting of described preservation;
(b8) portable station is measured dwelling house base station frequency error; With
(b9) according to the signal that receives from the dwelling house base station, portable station is adjusted second reference frequency.
7. the method for adjustment reference frequency as claimed in claim 1, before wherein said step (b) also is included in and adjusts the 3rd reference frequency of dwelling house base station based on second reference frequency, preserve the second reference frequency control setting, and the described step (b) that wherein is used to adjust the 3rd reference frequency comprises the following steps: also
(b1) according to the signal that receives from the dwelling house base station, portable station is adjusted second reference frequency;
(b2) communication link of foundation and described dwelling house base station;
(b3) dwelling house base station frequency error is defined as the function of the second reference frequency control setting and the second reference frequency control setting of being preserved;
(b4) determine that whether dwelling house base station frequency error is greater than threshold value;
(b5) to dwelling house base station report dwelling house base station frequency error;
(b6) the 3rd reference frequency of adjustment dwelling house base station; With
(b7) according to the signal that receives from the dwelling house base station, portable station is adjusted second reference frequency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/246.650 | 1994-05-20 | ||
| US08/246,650 | 1994-05-20 | ||
| US08/246,650 US5701589A (en) | 1994-05-20 | 1994-05-20 | Method for adjusting reference frequencies in a communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1129049A CN1129049A (en) | 1996-08-14 |
| CN1074618C true CN1074618C (en) | 2001-11-07 |
Family
ID=22931596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95190459A Expired - Lifetime CN1074618C (en) | 1994-05-20 | 1995-03-24 | Method for adjusting reference frequency in communication system |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5701589A (en) |
| JP (1) | JP3197015B2 (en) |
| KR (1) | KR100225765B1 (en) |
| CN (1) | CN1074618C (en) |
| AU (1) | AU2230595A (en) |
| DE (1) | DE19580681C2 (en) |
| FR (1) | FR2720212B1 (en) |
| GB (1) | GB2295298B (en) |
| IT (1) | IT1277863B1 (en) |
| MA (1) | MA23555A1 (en) |
| MX (1) | MX9600304A (en) |
| TW (1) | TW260849B (en) |
| WO (1) | WO1995032559A1 (en) |
| ZA (1) | ZA953705B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926746A (en) * | 1996-11-08 | 1999-07-20 | Qualcomm Incorporated | Frequency and other parameter adjustment using training channel |
| US6006106A (en) * | 1996-12-31 | 1999-12-21 | Ericsson Inc. | Method for automatic transceiver selection in a mobile multiple RF transceiver apparatus |
| US6339696B1 (en) * | 1999-11-05 | 2002-01-15 | Magnadyne Corporation | In-vehicle audio/video system |
| US8504099B2 (en) | 2006-01-11 | 2013-08-06 | Qualcomm Incorporated | Communication methods and apparatus relating to cooperative and non-cooperative modes of operation |
| US8811369B2 (en) | 2006-01-11 | 2014-08-19 | Qualcomm Incorporated | Methods and apparatus for supporting multiple communications modes of operation |
| FI20075681A0 (en) * | 2007-09-28 | 2007-09-28 | Nokia Corp | Access control for base stations |
| US8595501B2 (en) | 2008-05-09 | 2013-11-26 | Qualcomm Incorporated | Network helper for authentication between a token and verifiers |
| CN101902240B (en) * | 2008-11-20 | 2013-03-20 | 南京熊猫电子股份有限公司 | Setting method of miniaturized structure of satellite communication portable station |
| JP6186008B2 (en) * | 2013-11-27 | 2017-08-23 | 株式会社日立産機システム | Location information transmitter maintenance method and position information transmitter used therefor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4989230A (en) * | 1988-09-23 | 1991-01-29 | Motorola, Inc. | Cellular cordless telephone |
| US5081705A (en) * | 1989-06-29 | 1992-01-14 | Rockwell International Corp. | Communication system with external reference signal processing capability |
| US5163159A (en) * | 1990-07-30 | 1992-11-10 | Motorola, Inc. | Dual mode automatic frequency control |
| US5077790A (en) * | 1990-08-03 | 1991-12-31 | Motorola, Inc. | Secure over-the-air registration of cordless telephones |
| US5410588A (en) * | 1991-04-03 | 1995-04-25 | Kabushiki Kaisha Toshiba | Mobile radio communications system having a supervising radio transmitting station for transmitting a reference synchronizing signal to a first and second base stations via a radio link |
| US5363376A (en) * | 1993-07-30 | 1994-11-08 | Bell Communications Research, Inc. | Method and apparatus for synchronizing timing among radio ports in wireless communications systems |
-
1994
- 1994-05-20 US US08/246,650 patent/US5701589A/en not_active Expired - Lifetime
-
1995
- 1995-03-24 GB GB9601044A patent/GB2295298B/en not_active Expired - Lifetime
- 1995-03-24 JP JP53027195A patent/JP3197015B2/en not_active Expired - Lifetime
- 1995-03-24 WO PCT/US1995/003765 patent/WO1995032559A1/en not_active Ceased
- 1995-03-24 DE DE19580681T patent/DE19580681C2/en not_active Expired - Lifetime
- 1995-03-24 AU AU22305/95A patent/AU2230595A/en not_active Abandoned
- 1995-03-24 CN CN95190459A patent/CN1074618C/en not_active Expired - Lifetime
- 1995-04-19 FR FR9504659A patent/FR2720212B1/en not_active Expired - Lifetime
- 1995-05-05 TW TW084104506A patent/TW260849B/en not_active IP Right Cessation
- 1995-05-08 ZA ZA953705A patent/ZA953705B/en unknown
- 1995-05-17 MA MA23890A patent/MA23555A1/en unknown
- 1995-05-19 IT IT95RM000335A patent/IT1277863B1/en active IP Right Grant
-
1996
- 1996-01-19 MX MX9600304A patent/MX9600304A/en unknown
- 1996-01-20 KR KR1019960700304A patent/KR100225765B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2720212A1 (en) | 1995-11-24 |
| ITRM950335A1 (en) | 1996-11-19 |
| IT1277863B1 (en) | 1997-11-12 |
| DE19580681T1 (en) | 1996-08-22 |
| GB2295298A (en) | 1996-05-22 |
| JP3197015B2 (en) | 2001-08-13 |
| MX9600304A (en) | 1998-11-30 |
| GB9601044D0 (en) | 1996-03-27 |
| TW260849B (en) | 1995-10-21 |
| JPH09500779A (en) | 1997-01-21 |
| US5701589A (en) | 1997-12-23 |
| WO1995032559A1 (en) | 1995-11-30 |
| DE19580681C2 (en) | 2000-12-07 |
| KR100225765B1 (en) | 1999-10-15 |
| ITRM950335A0 (en) | 1995-05-19 |
| ZA953705B (en) | 1996-03-12 |
| FR2720212B1 (en) | 2000-01-21 |
| CN1129049A (en) | 1996-08-14 |
| GB2295298B (en) | 1998-09-09 |
| MA23555A1 (en) | 1995-12-31 |
| AU2230595A (en) | 1995-12-18 |
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| C14 | Grant of patent or utility model | ||
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Owner name: MOTOROLA MOBILE CO., LTD. Free format text: FORMER OWNER: MOTOROLA INC. Effective date: 20101230 |
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Effective date of registration: 20101230 Address after: Illinois Instrunment Patentee after: Motorola Mobility LLC Address before: Illinois Instrunment Patentee before: Motorola Inc. |
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Expiration termination date: 20150324 Granted publication date: 20011107 |